The Halema'uma'u crater on Kilauea, located in Hawaii, has been relatively quiet over the last year after a frenzy of activity in 2018, which all began with an explosive eruption of ash 30,000 feet into the air during May. But, since at least 2019, there has been a change that scientists believe could pose a potential danger to the Big Island. Water has started to collect in the caldera to form a lake.

A caldera is a large crater left behind in a volcano after an eruption. From 2010 until 2018, a lava lake had filled the caldera rather than water. That changed in May 2018 when the eruption caused the lava lake to drain, collapsing the caldera floor and causing a hole nearly as deep as the 1,776-foot One World Trade Center. The eruption also created a 459-foot cliff (140 meters) north of the crater.

About a year later, a helicopter pilot flying over the volcano noticed a mysterious green pool of water in the Halema'uma'u crater. A second report of the same findings from a helicopter passenger prompted USGS-Hawaiian Volcano Observatory researchers to survey the green pool of water.

An astronomer at the McDonald Observatory has discovered a planet with fantastic red and green ripples in its atmosphere. It looks a lot like Texas.

Stephen Hummel was walking across the famous University of Texas observatory grounds a couple hours after sunset on May 13th when he noticed the flash of lightning from a distant thunderstorm. "I saw a large column of sprites leaping into the sky and rushed to set up my camera," he says. Aiming southeast towards the city of Alpine, he recorded this movie:

Comment: There was a time when capturing a sprite on camera was rare. Now they occur daily and can be seen without special cameras...

At least four brush fires merged into one blaze and scorched thousands of acres across Southwest Florida as of Thursday, spurring evacuations and shutting down a major interstate.

The Florida Forestry Service said that one of the fires near Naples threatened about 30 homes in the Collier County area of Golden Gate Estates. As of Wednesday night, the blaze grew to around 5,000 acres after four different brush fires combined,

Tuesday evening's stormy skies over Metro Vancouver may have produced a funnel cloud.

Photos and a video posted onto social media show a funnel cloud hovering over the Fraser River delta near Vancouver International Airport. The distinctive weather formation was also seen from a distance in the southern horizon from downtown Vancouver.

A thunderstorm cell was reported in the area, but according to The Weather Network meteorologist Tyler Hamilton it is a tossup over whether this was a supercell, which is commonly associated with producing potent tornadoes.